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1. (adj.) Silurian
of or designating a period of the Paleozoic Era, occurring from 425 million to 405 million years ago, marked by the advent of air-breathing animals and terrestrial plants.
2. (n.) Silurian
the Silurian Period or System.
Etymology: (1835; < L Silur(es) a Celtic tribe of ancient SE Wales)
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| Definition of 'Silurian' |
Princeton's WordNet |
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1. (noun) Silurian, Silurian period
from 425 million to 405 million years ago; first air-breathing animals
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| Definition of 'Silurian' |
Webster Dictionary |
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1. (adj) Silurian
of or pertaining to the country of the ancient Silures; -- a term applied to the earliest of the Paleozoic eras, and also to the strata of the era, because most plainly developed in that country
2. (noun) Silurian
the Silurian age
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Definitions of Silurian 
